PdfDigitalSignatureProfile Property

Gets or sets the PAdES baseline profile of the produced signature, as defined by ETSI EN 319 142-1. The default is Auto, which preserves the behavior of the previous versions: PAdES B-T when TimestampServerUrl is configured, PAdES B-B otherwise. The PadesBaselineLT and PadesBaselineLTA profiles additionally embed the certificate chains and their revocation information into the document and, for LTA, apply a document timestamp, enabling validation long after the certificates expire. Both long-term profiles require TimestampServerUrl to be set

public PdfDigitalSignatureProfile Profile { get; set; }